I'd stick with what you have. If the tube is looking rough, repaint it. The only thing I don't like about mine is the rubber elbow connecting to the TB rubs the hoodliner and looks like crap. I'm not into engine dress up so I really don't care too much.
The elbow on my CAI rubbed on my hoodliner too, even before I added the 3/8" spacer. I trimmed off the bottom of the elbow (and some on the sides) on the TB end to make it angle down a bit. If I didn't have the spacer, I don't think it would rub (or at least not nearly as much).
For the ZERO power gain the CAIs and RAIs offer you may as well put the stock tube back on.
I just put on a 3/8'' spacer last week so it rubs even more now.